I find exactly the opposite. I use adblockers, privacy badger, allow no third party cookies, and segregate google logins. It's pretty obvious from my google & youtube searches that they have no idea who I am or where I've been.

Funnily enough, it wouldn't occur to me however to use my own experience to make a sweeping judgement about what Google does in the large, because I just don't know. Even if I suspected, I'd be loath to confuse this with knowledge for the sake of my own cognitive hygiene.